The researchers used a machine called an "electroretinogram" to test the field of vision - firing a tiny beam of light at the shark in a darkened tank from all directions.
研究人员利用“网膜电图”机测试视野——在一个黑暗的箱子里从各方位向鲨鱼发射一丝微弱的光。
A light beam shot through a blob of rubidium atoms can directly and reliably measure the size and orientation of a magnetic field, a team of physicists reports in the Sept. 13 Physical Review a.
9月13日，据一个物理学家小组在物理学评测A中的报道，一束光照射过一团铷原子就可以直接可靠地测量出一个磁场的大小和方向。
Another important application of diffraction theory is the study of the far field divergence Angle of a collimated light beam.
衍射理论的另一个重要应用就是研究准直光束的远场发散角。
Objective to explore a rapid method of calculating an equivalent square field for irregular photon beam fields.
目的探讨一种快捷、准确求光子束不规则射野等效方野的方法。
It is assumed that the flexibility of a beam may be described by a one -dimensional field.
假定梁的弹性特性可用一维随机场来描述，研究了弹性静定梁一维随机场问题。
The use of laser cooling atomic beam technique can greatly reduce this aberration and makes the magnetic lens a useful tool in the field of atomic optics.
应用激光冷却技术能使这一影响减小，从而使磁透镜在原子光学领域得到更广泛的应用。
Analysing the character of internal forces of anchor cable frame by winkler model and verifying it by field test a calculation method is put forward based on elastic foundation beam.
利用winkle r地基模型分析锚索框架的受力特征，并通过现场试验加以验证，提出锚索框架的弹性地基梁计算模式。
The dynamic light beam pointing technology is used to keep orientation of light beam invariable, and light can be focused around some a fixed position in the field of view.
动态光束定向技术用于使光束传播方向保持不变，进而将成像目标稳定在视场中的某一固定位置。
This paper is a report on the field test of the earthquake response of a highway continuous beam bridge.
本文系一座公路连续梁桥以抗震分析为目的的现场测试总结。
The invention relates to a structure for increasing strength and service life of a deformable beam and an application thereof, belonging to the field of micro-electronic mechanical system (MEMS).
本发明涉及一种增加变形梁强度和使用寿命的结构及其应用，属于微电子机械系统(MEMS)领域。
A scan field distortion correction function fore-beam exposure system is deduced on the basis of the plane field alternation principle, and a simulative fruit is given by computer.
根据平面区域变换的原理，导出电子束曝光机扫描场的畸变校正函数，并给出计算机模拟校正的结果。
In this paper, the kinetic power theorem is used for solving the problem of interaction between a relativistic electron beam moving in a static magnetic field and a travelling electromagnetic wave.
本文利用动功率定理求解静磁场中运动的相对论性电子束与波导中电磁行波的相互作用问题。
A series of giant positive magnetoresistance of magnetic multilayer structure were fabricated by ion-beam sputtering in high vacuum with applied magnetic field and treatment.
采用离子束溅射方法制备了正巨磁电阻多层膜，在制备过程中采用外加磁场和退火处理。
Tapered beam of a steel portal frame is numerically simulated by the finite element method, and the changes of temperature field under the ISO time-temperature curve and local fire are obtained.
采用有限元法对门式钢刚架结构中的变截面梁进行了数值模拟，分别得到其在ISO标准升温曲线和局部火灾下的温度场变化，考察了升温曲线及火源位置对变截面梁升温的影响。
Nodular defects, which are in critical state of damage, are cross-sectioned by focusing on the ion beam and by imaging using a field emission scanning electron microscope.
采用聚焦离子束和场发射扫描电镜对处于临界破坏状态的节瘤缺陷做剖面分析和观察。
However, the discovery of bioeffects induced by ion beam implantation has opened a new branch in the field of ion beam applications in the life science-low-energy Heavy ion Biology.
离子注入生物效应的发现开拓了低能离子束技术在生物学中应用的新领域，形成了一个新的交叉学科——低能重离子生物学。
This paper gives a quantum mechanical analysis of the interaction between the electromagnetic field and the electron beam of free electron stimulated emission devices or linear electron accelerator.
本文对自由电子受激辐射器件与电子直线加速器中的电子注与电磁场的相互作用进行了量子力学分析，认为电子注的电子结构应由束缚电子对组成。
Ions accelerated by the electric field in the sheath form a shape of beam and a flux distribution on the target surface, which are strongly dependent on the applied voltage.
离子被鞘层中的加速电场加速，以束流的形式注入到工件表面，而束流分布的情况与作用电压有着十分密切的关系。
A numerical model is developed for the calculation of transient temperature field of thin film coating induced by a long-pulsed high power laser beam.
本文建立了一个光学薄膜在长脉冲激光作用下的模型来计算激光作用下的温度场。
Within this area, the field strength of the beam from the satellite must exceed a specific value.
在此区域内，来自卫星的波束场强必须超过某一特定值。
The far-field irradiance distribution of a Gaussian beam which is transmitted from telescope with certain center obscure is researched in this paper.
讨论了环形孔径高斯光束的远场光斑能量分布，并给出了拟合表达式。
The present invention relates to a method for raising output power of fibre-optic laser and quality of its optical spectrum and beam, belonging to the field of laser and optoelectronics.
一种提高光纤激光器的输出功率、光谱和光束质量的方法，属于激光及光电子学领域。
Then a cross scanning of beam is presented to adjust the laser beam until it falls in the center of the telescope field of view.
提出了一种十字形光束扫描方法将激光光束调节到望远镜视场的中心位置。
A construction method of concrete beam-column nodes relates to the building engineering technical field.
混凝土的梁柱节点施工方法，涉及建筑工程技术领域。
Electron beam will deflect in a magnetic field. With the deflection of electron beam in workpiece, tiny curved hole can be machined.
利用电子束在磁场中偏转的原理，使其在工件内部偏转，可加工出微细弯孔。
The Yamato cannon is a terrifying weapon that USES an intense magnetic field to focus a nuclear detonation into a cohesive beam of energy.
大和炮是一种威力极大的武器，它通过强大的磁场将核爆炸的能量以波的形式发射出去。
The method for torsional analysis of ship hull as a stepped thin-walled beam using the restrained torsion theory has been applied widely in the field of naval architecture.
将船体作为阶梯薄壁梁，用薄壁梁的约束扭转理论进行扭转强度分析的方法，是目前国内外造船界普遍使用的方法。
Vibration of a micro beam structure under the nonlinear electric field force in MEMS is studied.
研究微机电系统(MEMS)中微梁结构在非线性电场力下的振动问题。
The axcion can produce a non-diffracting beam, and it is used to extend depth of field of optical imaging system, and the theorem of this method is analyzed in this paper.
利用轴锥镜能产生无衍射光的特性，分析了将其应用到成像系统中增大景深的原理。
A proximity sensor often emits an electromagnetic or electrostatic field, or a beam of electromagnetic radiation (infrared, for instance), and looks for changes in the field or return signal.
一个接近性传感器通常会发出电磁或静电场，或电磁辐射光束(例如红外)，以及在外地或返回信号的变化看。
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